Patent GB-975095-A (GB)
Title: Flame proofing of cellulosic materials
IPC: D06M15/431
Filed: 1961-11-20
Abstract: A treating composition for cellulosic material comprises a hydroxymethyl phosphonium chloride compound, a methylol substituted triazine, triazone or cyclic alkylene urea, a water soluble tertiary alkyl amine, urea, a polyvinyl chloride resin having a softening point, when substantially pure, above 170 DEG C., and water. Compounds referred to are triazines and d-i. methylol cyclic alkylene ureas, e.g. methylol melamine and its tri-methyl ether, triazones, dimethylol ethylene urea and dimethylol propylene urea. Triethylamine, triethanolamine and triisopropanolamine are suitable tertiary alkyl amines. The polyvinyl chloride resin is preferably unplasticized. It may contain minor proportions of other monomers and plasticizers provided the softening point is not reduced below 160 DEG C. The composition can be applied to cotton, rayon, ramic, jute, wool, paper and cardboard, by spraying, padding, rolling or other methods After drying, the treated material is heated to use the resin and may then be scoured. In an example "battle-ax" fabric is impregnated with an aqueous mixture of tetrakis-(hydroxymethyl) phosphonium chloride, triethanolamine, trimethylol melamine, urea, and an aqueous dispersion of polyvinyl chloride resin (n.p. 180 DEG C.). After drying at 121 DEG C. curing is effected at 370 DEG C. for 10 secs. in an infrated oven. Other examples (some for comparison) describe the use of P.V.C. resins of softening point 40 DEG -50 DEG C., 70 DEG  to 80 DEG C., 110 DEG  to 120 DEG C., 140-150 DEG C., 180 DEG -200 DEG C. and 190 DEG  to 200 DEG C.ALSO:A treating composition for cellulosic material comprises a hydroxymethyl phosphonium chloride compound, a methylol substituted triazine, triazone or cyclic alkylene urea, a water-soluble tertiary alkyl amine, urea, polyvinyl chloride resin having a softening point, when substantially pure, above 170 DEG C., and water.  Nitrogen compounds referred to are triazines and dimethylol cyclic alkylene ureas, e.g. methylol melamine and its tri-methyl ether, tri-azones, dimethylol ethylene urea and dimethylol propylene urea.  Triethylamine, triethanolamine and tri-isopropanolamine are suitable tertiary alkyl amines.  The polyvinyl chloride resin is preferably unplasticised.  It may contain minor proportions of other monomers and plasticisers provided the softening point is not reduced below 160 DEG C.  The composition can be applied to cotton, rayon, ramie, jute, wool, paper and cardboard, by spraying, podding rolling or other methods.  After drying, the treated material is heated to use the resin and may then be scoured. In an example "battle-ax" fabric is impregnated with an aqueous mixture of tetrakis- (hydroxy-methyl) phosphonium chloride, triethanolamine, trimethylol melamine, urea, and an aqueous dispersion of polyvinyl chloride resin (m.p. 180 DEG C.).  After drying at 121 DEG C. curing is effected at 370 DEG C. for 10 secs. in an infrared oven. Other examples (some for comparison) describe the use of P.V.C. resins of softening point 40 DEG -50 DEG C., 70 DEG  to 80 DEG C., 110 to 120 DEG C., 140-150 DEG C., 180 DEG -200 DEG C., and 190 DEG  to 200 DEG C.